package TUILayer;//makes this class a part of the TUILayer package
import java.util.Scanner;

/**
 * 
 * User interface - main menu
 * The entry-point for the application:
 * Create an instance of class MainMenuUI and the constructor starts the application
 * 
 * @author (kbh) 
 * @version (2005.03.31)
 * (FEN): 2006.02.24: Comments translated into English
 * (FEN): 2006.03.21: Some changes to the architecture in order to assure layering
 *                    and loose coupling
 *                    
 * (KBH): 2008.10.24: Change af manimenuStart to if
 */
public class MainMenuUI
{
    //the reference to the ControlLayer
    private AddressBookUI adrUI;//references to other UI objects
    private DvdUI dvdUI;
    private LoanUI loanUI;
      
    public MainMenuUI()
    {
    }
   
    public void mainMenuStart()
    {
        boolean exit = false;
        while (!exit) //! means while exit not is true (that is: false)
        {
            int choice = writeMainMenu();
            if(choice == 1)
            {
                startAddressBook();
            }
            else
            {
                    if (choice == 2)
                    { 
                        startDvd();
                    }
                    else
                    {
                        if (choice == 3)
                        {
                            startLoan();
                        }//end if
                        else
                        {
                            writeEnd();
                            exit = true;
                        }//end else
                    }// end else
            }//end else
        }//end while
    }//end start
    
    private int writeMainMenu()
    {       
        // creates a keyboard object to read input
        Scanner keyboard = new Scanner(System.in);
        System.out.println("\f *** MainMenu ***");
        System.out.println(" (1) AddressBook");
        System.out.println(" (2) DVDs");
        System.out.println(" (3) Loan");
        System.out.println(" (4) Close");
        System.out.print("\n Make your choice: ");
            
        int choice = keyboard.nextInt();
            
        return choice;
    }
    
    private void startLoan()
    {
        loanUI = new LoanUI();
        loanUI.start();
    }
    
    private void startAddressBook()
    {
        adrUI = new AddressBookUI();
        adrUI.start();
    }

    private void startDvd()
    {
        dvdUI = new DvdUI();
        dvdUI.start();
    }
    
    private void writeEnd()
    {
        System.out.println(" The System is shuting down ");
        System.exit(0);
    }
}
